(cba:news) Victories of April
Joe Patterson
jop at astro.columbia.edu
Sat Apr 28 07:50:21 EDT 2001
Dear CBAers,
Time to report on our April campaigns...
V803 CEN has been covered thoroughly now for 37 nights, with
usually quite long coverage (often >10 hours). Superhumps
were seen on every night, and we were able to count cycles
reliably from night to night, which we could not quite do in
the 1997 campaign. The most critical observations came from
New Zealand (Fred and Jennie, Bob Rea, Bill Allen), with
South Africa and Australia (Jonathan, Doug Welch) chipping in
too. The usual 22-23 hour periodicity (dwarf-nova eruption?)
was present throughout. But the most interesting result was
the value of the superhump period, just 0.45% longer than
Porb... This roughly determines the mass of the secondary
star (the donor) to be 0.015+-0.005 Mo. Our puniest
secondary yet (most are in the range 0.08-0.20 Mo)!
We can quit on V803 Cen now. We'll never - not for a few
years anyway - get coverage quite this good, and the star was
even gracious enough to stage a supermax during the campaign.
Time to move on.
CR BOO has been a steady target of John Stull, with
contributions also from Tonny and Dave East. Nothing recent
from the Kiwis, who are rewriting the book on V803 Cen. The
star is vigorously superhumping, but we really need much more
extensive coverage, and from a range of longitudes. With its
equatorial position the star should be a prime target - the
prime target - for everyone.
The other two stars needing mention now are DW UMA and HP
LIB. The former is particularly good for some of you because
of its far-northern position, and we'll keep after it. We'll
start a proper campaign on HP Lib within a few weeks, but
this is a pretty good time to get started... so if anyone
wants to get us started, we'll take it from there!
By the way, I plan to attend the IAPPP conference in Big
Bear, CA on May 23, and then the Riverside ATM conference
after that. Any other CBAers going? Definitely good
territory for recruitment, and for CBA networking too.
So: in the north, CR Boo, DW UMa, HP Lib
in the south, CR Boo, HP Lib
joe
For light curve lovers, here's a nice run on V803 Cen
from Fred and Jennie. Suitable for framing.
JD V-C
24.85531 1.167
24.8557 1.161
24.85611 1.143
24.85651 1.15
24.85691 1.16
24.85732 1.184
24.85771 1.2
24.85811 1.18
24.85852 1.173
24.85891 1.177
24.85932 1.21
24.85971 1.226
24.86012 1.199
24.86052 1.182
24.86092 1.231
24.86132 1.178
24.86173 1.243
24.86212 1.197
24.8635 1.141
24.8639 1.234
24.86431 1.191
24.8647 1.183
24.8651 1.227
24.86551 1.235
24.8659 1.226
24.86631 1.208
24.8667 1.189
24.86711 1.176
24.86751 1.177
24.86791 1.219
24.86831 1.113
24.86871 1.17
24.86911 1.158
24.86951 1.158
24.86992 1.171
24.87031 1.149
24.87072 1.195
24.87112 1.196
24.87152 1.223
24.87192 1.187
24.87233 1.198
24.87272 1.193
24.87312 1.209
24.87352 1.162
24.87432 1.17
24.87472 1.183
24.87513 1.174
24.87552 1.201
24.87593 1.188
24.87633 1.169
24.87672 1.181
24.87713 1.163
24.87753 1.185
24.87794 1.155
24.87833 1.173
24.87874 1.179
24.87914 1.196
24.87954 1.233
24.87994 1.261
24.88074 1.166
24.88114 1.182
24.88155 1.21
24.88195 1.203
24.88236 1.211
24.88277 1.207
24.88316 1.187
24.88356 1.207
24.88396 1.224
24.88436 1.201
24.88476 1.218
24.88516 1.212
24.88557 1.2
24.88595 1.195
24.88635 1.17
24.88675 1.193
24.88715 1.215
24.88756 1.158
24.88795 1.203
24.88835 1.176
24.88876 1.162
24.88918 1.161
24.88956 1.218
24.88997 1.255
24.89036 1.218
24.89076 1.152
24.89117 1.186
24.89156 1.2
24.89197 1.201
24.89237 1.188
24.89276 1.145
24.89317 1.167
24.89358 1.168
24.89397 1.189
24.89438 1.143
24.89478 1.184
24.89517 1.172
24.89558 1.196
24.89598 1.208
24.89639 1.164
24.89679 1.22
24.89719 1.164
24.89759 1.182
24.898 1.238
24.89839 1.19
24.8988 1.199
24.8992 1.236
24.89959 1.212
24.9 1.223
24.90041 1.219
24.9008 1.199
24.9012 1.196
24.90161 1.191
24.90202 1.188
24.90241 1.233
24.9028 1.188
24.90321 1.194
24.9036 1.194
24.90399 1.229
24.90439 1.262
24.90479 1.214
24.90519 1.173
24.90558 1.161
24.90597 1.137
24.90638 1.148
24.90677 1.153
24.90717 1.156
24.90757 1.167
24.90796 1.174
24.90836 1.201
24.90876 1.174
24.90916 1.172
24.90955 1.169
24.90994 1.167
24.91035 1.141
24.91074 1.146
24.91113 1.143
24.91153 1.127
24.91193 1.173
24.91233 1.167
24.91273 1.127
24.91312 1.098
24.91353 1.149
24.91394 1.165
24.91433 1.185
24.91473 1.152
24.91514 1.139
24.91553 1.128
24.91594 1.17
24.91634 1.168
24.91674 1.179
24.91714 1.208
24.91755 1.183
24.91794 1.194
24.91835 1.198
24.91875 1.221
24.91914 1.186
24.91955 1.159
24.91995 1.19
24.92035 1.206
24.92075 1.214
24.92115 1.156
24.92155 1.205
24.92196 1.194
24.92235 1.186
24.92275 1.202
24.92315 1.155
24.92354 1.149
24.92393 1.21
24.92433 1.175
24.92472 1.191
24.92513 1.141
24.92552 1.138
24.92592 1.12
24.92631 1.184
24.9267 1.167
24.92709 1.171
24.9275 1.184
24.9279 1.184
24.92829 1.16
24.92868 1.196
24.92907 1.141
24.92947 1.118
24.92987 1.129
24.93027 1.165
24.93066 1.156
24.93105 1.125
24.93145 1.098
24.93185 1.151
24.93225 1.164
24.93264 1.182
24.93303 1.144
24.93343 1.116
24.93383 1.11
24.93422 1.148
24.93462 1.139
24.93501 1.155
24.93541 1.192
24.9358 1.189
24.9362 1.182
24.9366 1.209
24.93699 1.179
24.93739 1.144
24.93778 1.139
24.93817 1.158
24.93858 1.164
24.93897 1.162
24.93936 1.143
24.93976 1.156
24.94015 1.149
24.94056 1.162
24.94095 1.161
24.94134 1.17
24.94173 1.119
24.94213 1.153
24.94253 1.15
24.94293 1.139
24.94332 1.112
24.94371 1.109
24.94411 1.11
24.9445 1.121
24.94491 1.145
24.9453 1.142
24.94569 1.142
24.94609 1.13
24.94648 1.138
24.94688 1.151
24.94728 1.136
24.94767 1.156
24.94807 1.114
24.94847 1.1
24.94886 1.073
24.94926 1.08
24.94965 1.089
24.95005 1.086
24.95045 1.089
24.95084 1.134
24.95124 1.165
24.95163 1.129
24.95203 1.128
24.95243 1.114
24.95282 1.11
24.95322 1.108
24.95361 1.144
24.95401 1.117
24.95441 1.131
24.9548 1.119
24.9552 1.173
24.95559 1.131
24.95599 1.112
24.95639 1.125
24.95678 1.149
24.95718 1.134
24.95757 1.137
24.95797 1.094
24.95837 1.122
24.95876 1.136
24.95916 1.163
24.95955 1.154
24.95995 1.122
24.96035 1.117
24.96074 1.154
24.96114 1.12
24.96153 1.09
24.96192 1.09
24.96233 1.098
24.96272 1.078
24.96311 1.121
24.96351 1.133
24.9639 1.117
24.96431 1.104
24.9647 1.105
24.96549 1.118
24.96588 1.069
24.96629 1.083
24.96668 1.051
24.96707 1.055
24.96746 1.055
24.96786 1.01
24.96827 1
24.96866 1.012
24.96905 1.021
24.96944 1.061
24.96984 1.017
24.97024 1.019
24.97064 1.035
24.97103 1.058
24.97142 1.082
24.97182 1.092
24.97221 1.114
24.9726 1.077
24.97301 1.11
24.9734 1.118
24.9738 1.122
24.97419 1.111
24.97458 1.101
24.97498 1.096
24.97538 1.062
24.97578 1.072
24.97617 1.032
24.97656 1.053
24.97695 1.061
24.97736 1.053
24.97776 1.083
24.97815 1.054
24.97854 1.032
24.97894 1.044
24.97934 1.044
24.97973 1.038
24.98012 1.031
24.98052 .989
24.98093 1.021
24.98132 1.014
24.98171 1.058
24.9821 1.013
24.9825 1.07
24.98291 1.052
24.9833 1.074
24.98369 1.042
24.98409 1.037
24.98448 .999
24.98488 .977
24.98528 .967
24.98567 .928
24.98606 .9
24.98646 .874
24.98686 .903
24.98726 .901
24.98765 .942
24.98805 .928
24.98844 .92
24.98884 .899
24.98924 .936
24.98963 .943
24.99003 .951
24.99043 .909
24.99082 .922
24.99121 .949
24.99161 1.012
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24.9928 .99
24.9932 1.017
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24.99437 .956
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24.99557 1.007
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25.00705 .833
25.00744 .851
25.00783 .825
25.00823 .853
25.00863 .845
25.00903 .841
25.00942 .835
25.00981 .87
25.01022 .892
25.01061 .893
25.01101 .839
25.0114 .857
25.0118 .871
25.0122 .895
25.01259 .874
25.01298 .861
25.01338 .808
25.01377 .848
25.01418 .849
25.01457 .844
25.01497 .82
25.01536 .835
25.01575 .844
25.01616 .863
25.01655 .848
25.01694 .84
25.01734 .795
25.01774 .837
25.01814 .844
25.01853 .812
25.01895 .788
25.01935 .812
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25.02013 .86
25.02053 .832
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25.02134 .826
25.02175 .797
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